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11-May-15Created by Mr. Lafferty1 Statistics www.mathsrevision.com Probability Line Calculating Simple Probability National 4 EF 1.3e.

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Presentation on theme: "11-May-15Created by Mr. Lafferty1 Statistics www.mathsrevision.com Probability Line Calculating Simple Probability National 4 EF 1.3e."— Presentation transcript:

1 11-May-15Created by Mr. Lafferty1 Statistics Probability Line Calculating Simple Probability National 4 EF 1.3e

2 11-May-15Created by Mr.Lafferty Maths Dept Starter Questions Expand and simplify 4( 3 + 2x) – 3(x + 1) National 4 EF 1.3e

3 11-May-15Created by Mr Lafferty Maths Dept Probability Learning Intention Success Criteria 1.Understand the probability line. 1.To understand probability in terms of the number line. 2.Calculate simply probabilities. National 4 EF 1.3e

4 Probability Likelihood Line CertainEvensImpossible Not very likely Very likely Winning the Lottery School Holidays Baby Born A Boy Seeing a butterfly In July Go back in time 11-May-15Created by Mr Lafferty Maths Dept National 4 EF 1.3e

5 Probability Likelihood Line CertainEvensImpossible Not very likely Very likely Everyone getting 100 % in test Homework Every week Toss a coin That land Heads It will Snow in winter Going without Food for a year. 11-May-15Created by Mr Lafferty Maths Dept National 4 EF 1.3e

6 11-May-15Created by Mr. Lafferty Maths Dept. Now try Ex Intro. Ch18 (page 214) Probability National 4 EF 1.3e

7 11-May-15Created by Mr.Lafferty Maths Dept Starter Questions Q1.Calculate 7 – 5 x 2 Q2.Calculate Q3.Is this triangle right angled ? Explain National 4 EF 1.3e

8 11-May-15Created by Mr Lafferty Maths Dept Probability Learning Intention Success Criteria 1.Calculate simply probabilities. 1.To understand probability calculate simple probabilities. National 4 EF 1.3e

9 Probability To work out a probability P(A) = Probability is ALWAYS in the range 0 to 1 11-May-15Created by Mr Lafferty Maths Dept We can normally attach a value to the probability of an event happening. National 4 EF 1.3e

10 Probability Number Likelihood Line CertainEvensImpossible Q. What is the chance of picking a number between 1 – 8 ? Q. What is the chance of picking a number that is even ? Q. What is the chance of picking the number 1 ? 8 8 = = = P = P(E) = P(1) = 11-May-15Created by Mr Lafferty Maths Dept National 4 EF 1.3e

11 Probability Likelihood Line CertainEvensImpossible Not very likely Very likely Q. What is the chance of picking a red card ? Q. What is the chance of picking a diamond ? Q. What is the chance of picking ace ? 52 = = = P (Red) = P (D) = P (Ace) = 52 cards in a pack of cards 11-May-15Created by Mr Lafferty Maths Dept National 4 EF 1.3e

12 11-May-15Created by Mr. Lafferty Maths Dept. Now try Ex 1 Ch18 (page 215) Probability National 4 EF 1.3e


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